Noncritical fluctuations of (net) charges and (net) protons from the iebe-vishnu hybrid model

Jixing Li, Hao-jie Xu, and Huichao Song
Phys. Rev. C 97, 014902 – Published 16 January 2018

Abstract

In this paper, we investigate the noncritical fluctuations of (net) charges and (net) protons in Au+Au collisions at sNN=7.7, 39, and 200 GeV, using iebe-vishnu hybrid model with Poisson fluctuations added in the particle event generator between hydrodynamics and urqmd. Various effects, such as volume fluctuations hadronic evolution and scatterings, resonance decays, as well as realistic centrality cuts and acceptance cuts have been embedded in our model calculations. With properly tuned parameters, iebe-vishnu roughly describes the centrality-dependent moments and cumulants of (net) charges and (net) protons measured in experiment. Further comparison simulations show that the volume fluctuation is the dominant factor to influence the multiplicity fluctuations, which makes the higher moments of (net) charges largely deviate from the Poisson baselines. We also find that the effects from hadronic evolutions and resonance decays are rather small or even negligible for the multiplicity fluctuations of both (net) charges and (net) protons.

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  • Received 31 July 2017

DOI:https://doi.org/10.1103/PhysRevC.97.014902

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Jixing Li1,2,*, Hao-jie Xu1,3,†, and Huichao Song1,2,4,‡

  • 1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 3School of Science, Huzhou University, Huzhou 313000, China
  • 4Center for High Energy Physics, Peking University, Beijing 100871, China

  • *jixli2014@pku.edu.cn
  • haojiexu@zjhu.edu.cn
  • huichaosong@pku.edu.cn

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Issue

Vol. 97, Iss. 1 — January 2018

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